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Finding the Fourth Proportional to 511.88, 706.70 and 401.09

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Solution

The fourth proportional to 511.88, 706.70 and 401.09 is: 553.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.88 : 706.70 = 401.09 : x
  2. Step 2: Convert to fraction form
    511.88/706.70 = 401.09/x
  3. Step 3: Cross multiply
    511.88x = 706.70 × 401.09
  4. Step 4: Simplify right side
    511.88x = 283,447.77
  5. Step 5: Solve for x
    x = 283,447.77/511.88
  6. Step 6: Final answer
    x = 553.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.